Dangerous Music 2-Bus Manuel - Sayfa 6

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Internal adjustments and jumpers

There are input cable shield ground lift jumpers on all the inputs of Mixer. This is to

facilitate proper studio grounding. All equipment in a recording studio that hooks up to

the AC mains should be grounded. This is usually accomplished by the third pin of the

mains power cord. Sometimes, buzzing noises can be heard in the speakers due to pieces

of gear getting multiple ground paths and allowing currents other than music into the

signal path. People have been known to cure ground hums by randomly lifting the AC

mains grounds with "ground lift adapters" or by cutting the third pin off of a mains cable.

This practice is frowned upon by the various safety agencies around the world. It is much

better to use balanced audio lines and lift the audio cable screen at one end of the cable.

There are jumpers inside of Mixer to change the state of input shield grounding. If a buzz

is encountered with an unbalanced input, connecting the jumper associated with that

input will probably cure the problem. To do this, the top of the box has to come off.

If one is uncomfortable with opening gear and changing jumpers or

making adjustments, please seek qualified help if necessary.

If adjustments or jumper changes are required, please disconnect the

mains plug before opening the top. Dropped screws or tools on a live circuit board can

ruin one's day and subsequent damage is not covered by the warranty.

This is the view looking down on the circuit board, rear panel towards viewer.

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